The elements of the electrical circuit theory

This tutorial is the collection of the lectures on the initial knowledge about the linear electric circuits, and it covers only the linear direct current circuits and the linear single-phase sinusoidal circuits. At the same time, the methods, which are usually used for analyzing the linear direct current circuits, are considered in the most detail, since although the linear direct current circuits are the easiest electric circuits, but in studying them, the important knowledge is able to be obtained that can be extraordinarily useful in analyzing the more complex electric circuits. When considering thelinear single-phase sinusoidal circuits, the attention is paid mainly to the specific features of these circuits, which differentiate them from the linear direct current circuits.